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Cheap flights from Ontario to Seoul from $608

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Seoul departing on 8/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:45 am - 10:25 pmONT  Ontario-GMP Seoul Gimpo Intl
29h 40m2 stops Taipei City Taiwan Taoyuan Intl Osaka Kansai Intl
Multiple Airlines Logo
8:10 am - 6:00 pmGMP  Seoul Gimpo Intl-ONT Ontario
25h 50m2 stops Osaka Kansai Intl Taipei City Taiwan Taoyuan Intl
$1,352Multiple Airlines
Sun, Sep 6 - Fri, Sep 18
Multiple Airlines Logo
12:45 am - 4:15 pmONT  Ontario-GMP Seoul Gimpo Intl
23h 30m2 stops Taipei City Taiwan Taoyuan Intl Osaka Kansai Intl
Multiple Airlines Logo
11:25 am - 5:05 pmGMP  Seoul Gimpo Intl-ONT Ontario
21h 40m2 stops Osaka Kansai Intl Taipei City Taiwan Taoyuan Intl
$1,558Multiple Airlines
Wed, Sep 2 - Mon, Sep 14
Multiple Airlines Logo
7:20 am - 9:15 pmONT  Ontario-GMP Seoul Gimpo Intl
45h 55m2 stops Dallas/Fort Worth Tokyo Haneda
Multiple Airlines Logo
12:05 pm - 11:47 amGMP  Seoul Gimpo Intl-ONT Ontario
39h 42m2 stops Tokyo Haneda Dallas/Fort Worth
$1,567Multiple Airlines
Mon, Sep 14 - Mon, Sep 28
Multiple Airlines Logo
12:45 am - 4:15 pmONT  Ontario-GMP Seoul Gimpo Intl
23h 30m2 stops Taipei City Taiwan Taoyuan Intl Osaka Kansai Intl
Multiple Airlines Logo
11:25 am - 5:40 pmGMP  Seoul Gimpo Intl-ONT Ontario
22h 15m2 stops Osaka Kansai Intl Taipei City Taiwan Taoyuan Intl
$1,601Multiple Airlines
Fri, Aug 21 - Sat, Aug 29
Multiple Airlines Logo
10:29 am - 9:15 pmONT  Ontario-GMP Seoul Gimpo Intl
42h 46m2 stops Dallas/Fort Worth Tokyo Haneda
Multiple Airlines Logo
7:15 pm - 8:07 pmGMP  Seoul Gimpo Intl-ONT Ontario
40h 52m2 stops Tokyo Haneda Dallas/Fort Worth
$1,813Multiple Airlines
Thu, Sep 3 - Thu, Sep 10
Japan Airlines Logo
6:00 am - 10:05 pmONT  Ontario-GMP Seoul Gimpo Intl
23h 05m2 stops Seattle/Tacoma Intl Tokyo Narita
Japan Airlines Logo
8:00 am - 1:36 pmGMP  Seoul Gimpo Intl-ONT Ontario
22h 36m2 stops Tokyo Haneda Dallas/Fort Worth
$1,852Japan Airlines
Wed, Nov 25 - Mon, Nov 30
Multiple Airlines Logo
9:25 am - 10:30 pmONT  Ontario-GMP Seoul Gimpo Intl
21h 05m2 stops San Francisco Tokyo Narita
Multiple Airlines Logo
7:45 am - 12:29 pmGMP  Seoul Gimpo Intl-ONT Ontario
21h 44m2 stops Tokyo Haneda San Francisco
$1,914Multiple Airlines
Sun, Oct 25 - Wed, Nov 4
Multiple Airlines Logo
9:25 am - 10:30 pmONT  Ontario-GMP Seoul Gimpo Intl
21h 05m2 stops San Francisco Tokyo Narita
Multiple Airlines Logo
7:45 am - 12:29 pmGMP  Seoul Gimpo Intl-ONT Ontario
21h 44m2 stops Tokyo Haneda San Francisco
$1,916Multiple Airlines
Sun, Oct 25 - Tue, Nov 17
Multiple Airlines Logo
9:25 am - 10:30 pmONT  Ontario-GMP Seoul Gimpo Intl
21h 05m2 stops San Francisco Tokyo Narita
Multiple Airlines Logo
7:45 am - 12:29 pmGMP  Seoul Gimpo Intl-ONT Ontario
21h 44m2 stops Tokyo Haneda San Francisco
$1,917Multiple Airlines
Thu, Oct 29 - Sat, Nov 7
Multiple Airlines Logo
9:25 am - 10:30 pmONT  Ontario-GMP Seoul Gimpo Intl
21h 05m2 stops San Francisco Tokyo Narita
Multiple Airlines Logo
7:45 am - 12:29 pmGMP  Seoul Gimpo Intl-ONT Ontario
21h 44m2 stops Tokyo Haneda San Francisco
$1,967Multiple Airlines
Sat, Oct 31 - Fri, Nov 6

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Customize your flight search to find flights from Ontario to Seoul Gimpo Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 6, 2026.
Use the filters below to find and compare flights from Ontario to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Sun 9/6

12:45 am-10:25 pm

2 stops29h 40m

Seoul Gimpo Intl

Fri 9/18

8:10 am-6:00 pm

2 stops25h 50m

$1,352

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Wed 9/2

12:45 am-4:15 pm

2 stops23h 30m

Seoul Gimpo Intl

Mon 9/14

11:25 am-5:05 pm

2 stops21h 40m

$1,558

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Mon 9/14

7:20 am-9:15 pm

2 stops45h 55m

Seoul Gimpo Intl

Mon 9/28

12:05 pm-11:47 am

2 stops39h 42m

$1,567

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Fri 8/21

12:45 am-4:15 pm

2 stops23h 30m

Seoul Gimpo Intl

Sat 8/29

11:25 am-5:40 pm

2 stops22h 15m

$1,601

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Thu 9/3

10:29 am-9:15 pm

2 stops42h 46m

Seoul Gimpo Intl

Thu 9/10

7:15 pm-8:07 pm

2 stops40h 52m

$1,813

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Wed 11/25

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Mon 11/30

8:00 am-1:36 pm

2 stops22h 36m

$1,852
Quickest round-trip

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Sun 10/25

9:25 am-10:30 pm

2 stops21h 05m

Seoul Gimpo Intl

Wed 11/4

7:45 am-12:29 pm

2 stops21h 44m

$1,914

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Sun 10/25

9:25 am-10:30 pm

2 stops21h 05m

Seoul Gimpo Intl

Tue 11/17

7:45 am-12:29 pm

2 stops21h 44m

$1,916

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Thu 10/29

9:25 am-10:30 pm

2 stops21h 05m

Seoul Gimpo Intl

Sat 11/7

7:45 am-12:29 pm

2 stops21h 44m

$1,917

OntarioSeoul

ONT Ontario - GMP Seoul Gimpo Intl

ONTGMP

Ontario

Sat 10/31

9:25 am-10:30 pm

2 stops21h 05m

Seoul Gimpo Intl

Fri 11/6

7:45 am-12:29 pm

2 stops21h 44m

$1,967

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seoul from

How to get the cheapest flight ticket from Ontario to Seoul Gimpo Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Seoul Gimpo Intl?

Japan Airlines is the most popular carrier operating from Ontario to Seoul Gimpo Intl

When to book flights from Ontario to Seoul Gimpo Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Seoul Gimpo Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Seoul Gimpo Intl Airport (ONT to GMP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Seoul Gimpo Intl Airport

Fastest flight time

21h 05m

Direct flights

None
The fastest flight from Ontario to Seoul Gimpo Intl Airport takes 21h 05m
There are no direct flights from Ontario to Seoul Gimpo Intl Airport. There are no popular flight routes from Ontario to Seoul Gimpo Intl Airport.
Search flight deals

Frequently asked questions about flying from Ontario to Seoul Gimpo Intl Airport

  • How far is Ontario to Seoul Gimpo Intl by plane?

    A flight from Ontario to Seoul Gimpo Intl will travel around 5983.3 mi. By plane, this route typically takes 21h 05m.

  • When did momondo last update prices for flights from Ontario Airport to Seoul Gimpo Intl Airport?

    Prices for flights from Ontario Airport to Seoul Gimpo Intl Airport were last updated today.

  • How old do you have to be to fly from Ontario Airport to Seoul Gimpo Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Seoul Gimpo Intl Airport.

  • What documentation or ID do you need to fly to Seoul Gimpo Intl Airport?

    The necessary travel and health documents for your Seoul Gimpo Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Seoul?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Seoul. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Seoul with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seoul from Ontario with this policy.

How can momondo help me find flights from Ontario to Seoul?

momondo helps you find the best flight between Ontario and Seoul by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Seoul right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seoul, momondo offers a useful price alert feature which will track prices for flights to Seoul from Ontario and alert you when they change.

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